simultaneous connections. At the moment, MAX_SHARED_MEMORY_BLOCKS = 2
Note that the amount of shared memory is limited on many systems,
32MB, while one block is already over 1MB at the moment...
You can connect to SHARED_MEMORY using the current key,
and key+1. There are a few commands that cannot currently be
executed in parallel among multiple connections,
since the implementation of the server
caches some data: rendering image (getCameraData),
getting contact point data and getting debug lines.